#include<iostream>
using namespace std;
int main()
{
cout<<"n e"<<endl;
cout<<"- -----------"<<endl;
cout<<"0 1"<<endl;
cout<<"1 2"<<endl;
cout<<"2 2.5"<<endl;
cout<<"3 2.666666667"<<endl;
cout<<"4 2.708333333"<<endl;
cout<<"5 2.716666667"<<endl;
cout<<"6 2.718055556"<<endl;
cout<<"7 2.718253968"<<endl;
cout<<"8 2.718278770"<<endl;
cout<<"9 2.718281526"<<endl;
return 0;
}

